I can't search the repositories

## Description

I can't search the repositories, what should I do？
## Reproduce

1. i use it install :
```sh
pip install jupyterlab-github
```
2. Jupyter lab like that:

3.I typed in the user name but nothing happened
## Expected behavior
1. jupyter extension
```
❯ jupyter server extension list
Config dir: /Users/jface/.jupyter

Config dir: /Users/jface/miniconda3/etc/jupyter
jupyter_lsp enabled
- Validating jupyter_lsp...
jupyter_lsp 1.5.1 OK
jupyter_server_terminals enabled
- Validating jupyter_server_terminals...
jupyter_server_terminals 0.4.4 OK
jupyterlab enabled
- Validating jupyterlab...
jupyterlab 3.5.3 OK
jupyterlab_code_formatter enabled
- Validating jupyterlab_code_formatter...
jupyterlab_code_formatter 1.5.3 OK
jupyterlab_github enabled
- Validating jupyterlab_github...
jupyterlab_github 3.0.1 OK
nbclassic enabled
- Validating nbclassic...
nbclassic 0.5.1 OK
notebook_shim enabled
- Validating notebook_shim...
notebook_shim OK

Config dir: /usr/local/etc/jupyter
~/work/03_jupyter ❯
```

2. environment
```
MacBook Pro M1 13-inch & MacOS 13.2

❯ jupyter --version
Selected Jupyter core packages...
IPython : 8.9.0
ipykernel : 6.21.0
ipywidgets : 8.0.4
jupyter_client : 8.0.2
jupyter_core : 5.2.0
jupyter_server : 2.1.0
jupyterlab : 3.5.3
nbclient : 0.7.2
nbconvert : 7.2.9
nbformat : 5.7.3
notebook : 6.5.2
qtconsole : not installed
traitlets : 5.9.0
~/work/03_jupyter ❯
```

I can't search the repositories, what should I do？